post-air filter, pre-turbo leaking oil on HDJ81 with 1HDT

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HillCountryTX

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I was hoping someone could help me out here with a diagnosis and hopefully, an easy fix. I noticed that the corrugated, bent portion of the air intake hose that is AFTER the air filter (probably a foot or so below the air filter along the air intake hose), but BEFORE the turbo, is wet with something (I'm guessing oil, but I'm not 100% sure here). I noticed it last night because I saw that there was an oily spot on the top of my front axle (the oily spot was nowhere near anything on the axle that could leak). I then got under the truck and looked directly up and saw that the bend in the air intake hose (the bend looks corrugated, plus it has several clamps on it if that helps) was covered in oil. I did not see it actively dripping while looking at it, but it's definitely enough to drip onto the axle below. I am NOT losing significant oil, just a bit.

Any thoughts? I saw this thread (link: 1HD-T Oil Leak: Air Intake ), but I am not losing anywhere near that much oil compared to the OP of that thread.

Anyone have any suggestions here?
 
+1 on the above.

You could also just vent to air if you don't want a catch can. I had a catch can, but I just took it out and vent to air now.
 
Thanks @IanB and @MonsterCruiser , I appreciate it. I will look into the catch can. I also saw that some of this oil blow-by may be from the way the baffles are bent within the valve cover (I guess the Safari Snorkel instructions tell you to bend the baffles so that there is a 10mm gap, rather than the much larger factory gap that is there), as referenced in this post: 1HD-FT Oil in intake (note: I do realize that the post I referenced was dealing with the 1HD-FT, but it still applies to the 1HDT as far as I understand it).

Have either of you tried adjusting the baffles too? Or just the oil catch can? I've found the Provent 200 for $140 on Amazon, but that's somewhat pricey...I guess if it works well and saves you from having to replace/repair your turbo it is totally worth it!

@MonsterCruiser, when you say vent it to the air, what does that mean? Wouldn't the oil that's getting pulled through the hose then just spray into our engine bay or make it smell like oil all the time? Just not sure what's actually involved in venting to the air (do you have buy anything additional? Or are you just disconnecting things?). Thanks!
 
I have my vent line going to air right now. There is honestly very little oil, not like it's spraying all over the vehicle or anything like that. It's just a piece of 5/8" fuel line hose coming off of the vent cover and runs down to my frame rail near the front and dumps to the ground. On normal around town driving nothing even comes out of it. If I do 4 hours of highway driving, I might end up with a 1" spot on the ground after I park. Might do the catch can one day, but for now it's not bothering me.
 
Mine is similar to what Dork has mentioned I run it across to where the exhaust used to run into the wheel well and I have the hose fixed to the splash guard in the wheel well with a zap strap. I'm sure some oil gets on some of the components under the truck, but it's not enough to cause any issues. Overall, I lose less than 500ml of oil over a 10,000km oil change interval, so I doubt there is much that comes out that PCV tube. Yes, over time it coats your intake if you leave it set up the factory way.
 
I've bent the baffles on my 1HD-T to 10mm and am venting to atmosphere through a hose from the valve cover opening, ending down by the frame rail. I've a Provent on the shelf. I should put it on one day. If I was planning a trip with deep water crossings it would speed up that project. For now...it sits.

hth's
gb
 
I keep getting a exhaust/blow by smell in the cab, at one point in time it was from the breather going to air and have since added a catch can and have it running back into the intake but now I am smelling it again so I figure a leak somewhere in the exhaust system.
 
Thanks y'all! @IanB ...how long have you had your stainless steel catch can installed (i.e. the one you provided a link to in post #2 above, link: Landcruiser Autana 80 Series FJ80 Turbo Diesel Stainles Steel Oil Catch Can Tank | eBay )?

It's between this stainless steel catch can you suggested @IanB, and the ProVent 200. I'm liking the fact that the stainless steel one has the inlet and outlet ports high up, and that they not offset vertically like the ProVent does. It seems weird that the ProVent's outlet port is low, as I don't intended on draining the captured oil with a permanently installed connection to the oil sump, but rather draining the oil from the catch can during an oil change. The other benefit is that I think the stainless steel catch can's 19mm ports are the same size as the factory hose (vs. the ProVent, which as a larger port opening and requires you to make an adaptor of sorts).

Is there a filter element inside this stainless steel catch can? Or is it literally just an empty stainless steel container? Also, I have a 5 speed manual (I've got the clutch stuff next to the brake booster on mine), so where did you install yours?

Thanks for all the help!! If you have any photos, please share...or if you a link to a build thread with the catch can installed, that'd be great too.
 
HillCountryTX said:
Thanks y'all! @IanB ...how long have you had your stainless steel catch can installed (i.e. the one you provided a link to in post #2 above, link: Landcruiser Autana 80 Series FJ80 Turbo Diesel Stainles Steel Oil Catch Can Tank | eBay )?

It's between this stainless steel catch can you suggested @IanB, and the ProVent 200. I'm liking the fact that the stainless steel one has the inlet and outlet ports high up, and that they not offset vertically like the ProVent does. It seems weird that the ProVent's outlet port is low, as I don't intended on draining the captured oil with a permanently installed connection to the oil sump, but rather draining the oil from the catch can during an oil change. The other benefit is that I think the stainless steel catch can's 19mm ports are the same size as the factory hose (vs. the ProVent, which as a larger port opening and requires you to make an adaptor of sorts).

Is there a filter element inside this stainless steel catch can? Or is it literally just an empty stainless steel container? Also, I have a 5 speed manual (I've got the clutch stuff next to the brake booster on mine), so where did you install yours?

Thanks for all the help!! If you have any photos, please share...or if you a link to a build thread with the catch can installed, that'd be great too.
Click to expand...

Mine's an auto, so no clutch master cylinder to get in the way for me. I installed it in July of last year, drained it for the 1st time when I changed my oil this spring, drained into a red solo cup and had an inch or so in the cup, so not a pile that was collected. I've not had it apart to confirm if there's any stainless steel wool or anything inside to assist in pulling the oil out of the air.
 
I'm lazy and just vent it on every diesel I have whether it came that way from factory or I made it that way. You will get the smell in cab in traffic with windows down or if you have some holes in the tub like my BJ40. Also a drop or two on the driveway/garage. I've tried a few DIY catch cans but didn't like the end result.
Every now and then I get a "hey your engine is smoking out the wheel well" from a good samaritan in traffic.
 
@IanB, I'm guessing from the photos on eBay of the stainless steel oil catch can that you're using, that it is impossible to see inside as it's totally sealed (except for the bottom oil drain). I sent an email to the eBay seller to see if there is a filter medium in there, or whether it's just an open can.

By the way...was the hose that they provide with the stainless steel catch can long enough to make the necessary connections? I plan on routing the outlet back into the air intake, similar to the factory setup, but I'll probably have to mount mine near the air filter, as my manual has the clutch master cylinder in the way of where you mounted yours.
 
HillCountryTX said:
@IanB, I'm guessing from the photos on eBay of the stainless steel oil catch can that you're using, that it is impossible to see inside as it's totally sealed (except for the bottom oil drain). I sent an email to the eBay seller to see if there is a filter medium in there, or whether it's just an open can.

By the way...was the hose that they provide with the stainless steel catch can long enough to make the necessary connections? I plan on routing the outlet back into the air intake, similar to the factory setup, but I'll probably have to mount mine near the air filter, as my manual has the clutch master cylinder in the way of where you mounted yours.
Click to expand...

I'm interested to hear what the seller has to say about the filter medium. The provided hose was a perfect fit when installed on the firewall as intended. Honestly, 75% of the draw to this specific catch can is the fact it's bolt in, 2 min install. If you've got to make modifications to mount it elsewhere, there may be better units for the price you could go with.
 
@Cancruiser...thanks! For the five years that you've had your ProVent 200 installed did you have it "Brovent" (tm) style that @Dougal referenced? In other words, reversed from what the factory style is set up for in terms of inlet/outlet?

The only reason I'm doing this oil catch can is because the post-filter, pre-turbo hose is saturated with oil and will drip a bit after a long drive onto the lower axle. I'd like to get this dried up.
 
No, just installed it per factory recommendation (see photos). It runs very well and collects about a cup every oil change (5000km).
The only thing I'd like to add to it is some sort of reservoir to catch a bit more oil before I have to empty it. But, I don't have much room under it to install such reservoir/bottle. So I empty it by hand every ~ 3000km or so.

The exhaust has been cleaner after I installed the can, and installed a small piece of clear hose to see what goes in to the turbo, which has been fairly clean too.
 
@Cancruiser, that's helpful. I'm thinking I'll go the ProVent 200 route and install it per factory recommendations (i.e. not Brovent).

Plus, I finally found an example of someone that installed a ProVent 200 in a 1HDT with a manual transmission (the manuals have the clutch master cylinder in the way, preventing an installation similar to what you did). The photos below are from 'legend80' at offroad80s.com (thread link: Offroad 80's • View topic - Fitting a catch can to a TD. Good idea or not?). Huge help in terms of helping me wrap my head around what I need to do to install a ProVent 200 in a manual 1HDT (HDJ81).

ProVent 200 #1:

provent002.jpg



ProVent 200 #2:

provent003.jpg


ProVent 200 #3:

provent004.jpg
 
Does anyone know what diameter (ID) the PCV hose is that goes from the 1HDT's valve cover to the air intake post-filter, pre-turbo? I've seen on the offroad80s.com thread that I linked in my previous post that the size is "about 16mm" (which is pretty close to 5/8 inch). I'm trying to order parts to do a Provent 200 install and will need to make/get a hose reducer/adaptor to be able to connect the Provent 200. Thanks!
 
I would say being Toyota it will be 16mm but I have used 5/8 and it fits once the hose clamp is done up.
 
As an update, I went ahead and ordered a Provent 200 + attachment kit from United Fuel Injection (Australia). I paid a little bit more than I wanted, but the convenience of having all the necessary parts/adapters in one kit is totally worth it for me. I will post some photos once the Provent arrives for those folks that have a 5-speed HDJ81 that are wanting to use an oil catch can.

@IanB , I heard back from the eBay seller that is offering the stainless steel oil catch can you provided the link to earlier in this thread. The seller said that the stainless steel catch can is NOT a baffled type catch can and does NOT have any sort of filter in it.
 
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